Boiler-locking lid.



A Patented Aug. I3, I90l. W. LUIS.

BDILER LOCKING LID (Applied/ign filed Ang. 8, 1899.,

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(No Model.)

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No. 680,607. Patented Aug. I3, Ism.

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BOILER LOCKING LID. (Application filed Aug. 8, 1899.) (No Model.) I 2Sheets-Sheet 2.

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flush-pipes may be introduced into the water- UNITED STATES PATENTOFFICE.

IVILI'IELM LUIS, OF CASSEL, GERMANY.-

BOILER-LOCKING VLID.

SPECIFICATION forming part of Letters Patent No. 680,607, dated August13, 1901.

Application led August 8,1899.

To @ZZ whom, t Wray concern,.-

Be it known that I, WILHELM LUIS, a subject of the King of Prussia,German Emperor, residing at Clnischestrasse 11, Cassel, Prussia,Germany, have invented Improvements in Boiler-Locking Lids, of which thefollowing is a specification. l

This invention relates to locking-lids for manholes or similar aperturesin boilers, and has for its object to provide means whereby tubes ofboilers for cleaning purposes.

With this object in view the invention consists in the improvedconstruction, arrangement, and combination of parts hereinafter fullydescribed and afterward specifically pointed out in the claims.

In the accompanying drawings, Figure l is a View of the part of theoutside of a waterbox of a boiler supplied with devices constructed inaccordance with my invention. Fig. 1 is a sectional view on the line A Bof Fig. 1, partly in elevation. Fig. 2 is a view similar to Fig. l,showing modified constructions of my invention. Fig. 2iL is a sectionalview on the line A B of Fig. 2.

Like letters of reference mark the same parts in all of the figures ofthe drawings.

Referring to the drawings by letters, C C C2 D D E E indicatewater-tubes of a boiler, secured in a Water-box F in any usual manner,such water-box being provided in its outer Wall with manholes G G' G2, HH', and I I' in line with the respective tubes, the Water-box beingstrengthened by suitable brace-rods J J". The manholes G G G2 areprovided with inner lids a, having annular iianges b, bearing againstthe inner edge of the Walls of the manholes, and with screwthreadedtubular extensions or clamp-plates t', bearing against the outer edgesof the walls of the manholes, packing-Washersj, and nuts le outside ofsaid washers. Flush-pipes c may be introduced through the tubularextensions dl into one or more of the Watertubes, and by tightening thenut 7c the lid may be clamped in position'and at the same time thepacking expanded to seal the bore of tubular extension d against leakagearound the iiush-pipe. When the Hush-pipe is not Serial No. 726,572. (Nomodel.)

in use, the tubular extension'd may be closed by'a screw-cap e, asshown.

In the before-described constructions the tubular extension isconcentric with the man# hole and Water-tube, but it is not absolutelynecessary that it be so situated, ity-being permissible to introduce theHush-pipe in a position eccentric with the holes and tubes. At C', Ihave shown such an arrangement of the flush-pipe at C C in connectionwith the Water-tubes D and manholes H, in which lids et a are providedwith eccentric openingsf for the flush-pipes, concentric solid-threadedextensions d d', clamp-plates o" i', and nuts 7s. The openingf may beclosed when the Hush-pipe is not in use by means of a screwplus g-Further modifications are shown in connection with water-tubes E E andmanholes I l', in which the lids a2 a2 are on the outside of themanholes and have anges b Z9'. lbearing against the outer edges of theWalls of the manholes. These lids are further provided With concentrictubular extensions d2, having interior threads to receive threaded plugsg' when the flush-pipe is not in use, and the lids are held in positionby `clamp-plates i2 2 on the outer projecting ends of bracerods J J,held by nuts 792, said plates bearing against the outer faces of thelids. The extension d2 may be threaded on the outside and a screw-cap eused for closing its aperture, and the lid may be prevented from turningby providing a square portion h to receive a iixed key. (Not shown.)

The construction and operation of my invention Will be readilyunderstood from the foregoing description. By it the flush-pipe may bereadily entered and removed Without removing the lid and the Water-tubesquickly and eectually cleaned.

Having thus described my invention, what I claim as new is 1. In aWater-tube boiler, the combination with a Water-box having a manhole inits outer wall and a water-tube in its inner wall in line with themanhole, of a lid for the manhole having an opening through which tointroduce a Hush-pipe through the lid and waterboX and into thewater-tube, and means for IOO tension outside of the packing-washer anda screw-cap for closing the end of the eXien= sion, substantially asdescribed.

In Witness whereof I have hereunto signed 15 my name, this 19th day ofJuly, 1899, in the presence of two subseribingwtnesses.

WILHELM LUIS. [n 5.]

Titnessesz JULIUS LION, HERMANN LION.

